Overseaming-machine.



J. 1. HEAP.

OVERSEAMING MACHINE. APPLICATION FILED JUNE 17 1916. v

Patented July 17, 1917.

Z SHEE'TS- S HEET 1.

J. J. HEAP'. OVEBSEAMING MACHINE.-

AEPLICATION FILED I UN 17., 191-6.

Patented my 17, 1917.

- 2 SHEETS-SHEET 2- fully disclosed.

JESSIE J". HEAP, OF NEW YORK, N. Y., ASSIGNOR T0 UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIfi ovnnsnAIMIne-Macnmn.

Specification of Letters Patent.

Patented July 11W, 19%.

Application filed June 1'7, 1915. Serial No. 34,688.

To all whom it may concern:

Be it known that I, Jnssn J. HEAP, a citizen of the United States, residing at New York city, in the county of New York, State of New York, have invented certain new and useful Improvements in Overseaming-Machines, of which the followin is a description, reference being had to t e accompanying drawing and to the figures of reference marked thereon.

The invention relates to new and useful improvements in overseaming machines, and more particularly to an edge turning device to be used in connection with an over-edge stitch forming mechanism.

An object. of the invention is to provide a machine of the above character, wherein the edge or edges of' the fabric sections be-. ing stitched may be turned back on to the bottom face of the fabric sections and encircled by over-edge stitches.

A further object of the invention is to provide a device of the above character,

wherein a folder folds the edge or edges of fabric sections around a stitch finger, said folder being so positioned that the overedge stitches are laid across the same and are fed off from the folder or edge turner on -to the stitch finger.

These and other objects will in part be obvious and will in part be hereinafter more In the drawings which show by way of illustration one embodiment of the invention,

Figure 1 is a view in plan showing the work support and certain of the parts of the sewing machine adjacent the same, to which my improvements are to be applied;

Fig. 1 is a diagrammatic view showing the over-edge stitching elements;

Fig. 2 is-aview in side elevation showing a portion of the work support, the trim mer blades and a presser foot having my improved edge turner thereon;

Fig. 3 is a plan view of the throat plate and the presser foot;

Fig. 4 is a side View of the same;

Fig. 5 is a bottom plan view of the presser foot and throat plate;

Fig. 6 is a plan view of the throat plate;

Fig. 7 is a bottom view of the presser foot;

Fig. 8 is a sectional view on the line 8 of Fig. 3;

Fig. *9" is a detail in sectionshowin the position of the edge turner and stitch nger at the point where the stitches are laid across the edge turner; I P

Fig. 10 is a detail view showing the stitch finger in section at the point where the stitches are fed off from the folder on to the stitch finger;

Fig. 11 is a diagrammatic view showing in top plan fabric sections stitched on my improved machine; and

Fig. 12 'is a sectional view on the line 12-12 of Fig. 11. i v I It is well known that in over-edging fabric sections, lwhere the edges of the sec-- tions have been trimmed, the needle must penetrate the fabric sections at a distance back from the edges of the fabric sections, so as to provide a'proper anchoringfor the threads encircling the edges. The purpose of the present.:invention is to provide means 'for turning the edges of the fabric sectionswhich are to be united underneath or on to the lower face of the fabric sections prior to the actual encircling of the edges with the over-edge stitches and these turned edges are, therefore, subsequently encircled by the over-edge stitches. Where the cut edges ofthe fabric sections are folded, as above noted, the needle may penetrate' the fabric sections' at a point much nearer theedge of the fabric sections and still have sufficient anchoring for the encircling threads. By this arrangement very 'much less thread is necessary for over-edging and firmly joining fabric sections. Furthermore, it is'well known that, when operating upon certain classes of fabrlcs, the trimming of the fabric sections produces free ends of threads which make up the fabrics and these free ends of the threads are liable-toextend through the over-edge stitches and make an unsightly edge.

as above described, this objection is avoided.

edges of the fabrics to be stitched on to the underface of the fabric sections just prior to the encircling of the same by the over-edge stitches. This folder preferably By folding back, however, the fabric sections,

folds these edges around the stitch finger and is so positioned that the overedge stitches are laid across the folder and are fed ofl from the folder or edge turner on to the folded edges of the fabric sections, and after the stitches are set the folded edges are fed off from the stitch finger.

Referring more in detail to the drawings, I have shown my improvements applied to a sewing machine consisting of a work support 1, having a throat plate 2 formed with feed slots 3, in which operates a feed dog 4. This throat plate is also provided with a needle opening 5 and a stitch finger 6. These parts are of the usual construction.

The machine is also provided with a trimming mechanism consisting of a lower fixed blade 7 and an upper movable blade 8. This upper movable blade 8 is carried by a swinging arm 9, which is also of the usual construction in this type of machine. The stitch forming mechanism includes a needle 10. Cooperating with'this needle 10 is a lower looper 11 and an over-edge looper 12. Each of the loopers may be thread carrying loopers. The needle and the loopers are shown diagrammatically in Fig. 1*, it being understood that other types of over-edge stitching mechanism may be used and the above is referred to herein merely for the purpose of illustration.

It will be noted that the trimming mechanism is in advance of the stitching mechanism and operates to trim the edges of the fabrics which are to be encircled by the over-edge stitches. Cooperating with the feed dog 4 is a presser foot 13. This presser foot is carried by a presser bar 1 1. The presser foot is cut away at 15 to provide a clearance space for the trimming members.

Mounted on the presser foot is an edge turner 16. This edge turner is provided with a shank 17, which is slotted at 18 for a clamping screw 19. The clamping screw 19 extends through the slot 18 into the foot portion 20 of the presser foot, as clearly shown in Fig. 8. This slotted connection for the edge turner permits the edge turner to be adjusted transversely of .the foot. The shank 17 is provided with a main portion 21 which projects down to the bottom level of the foot section, as shown in Figs. 8 and 9. This main portion carries the edge turner 16. Said edge turner is in the form of a scroll which projects below the face of the surface of the presser foot. Said scroll presents a concave face which is inclined to the line of feed and opens toward the fabric i sections being stitched. This turning scroll is so positioned relative to the stitch finger that the stitch finger extends through the end of the turning scroll, as clearly shown in Fig. 5. Said stitch finger extends beyond the end of the turning scroll. It will be noted that the needle is positioned in a line at right angles to the feed, which line cuts the turning scroll between its ends but at a point where the edges of the fabric have been substantially fully turned by the scroll.

In the operation of my device, two fabric sections, indicated at F and F, are directed to the stitching mechanism by an edge guide 22, see Fig. 1. This edge guide is so positioned that the raw edges of the fabric sections will be trimmed by the trimming blades 7 and 8. The cut edges are led to -the turning scroll which folds both edges around the stitch finger on to the lower face of the fabric sections. In Fig. 12, I have shown the edges of the fabric turned back at f and f on to the lower face of the fabric section F and these edges are encircled by the over-edge stitches consisting of a needle thread a and the looper threads Z and Z. The needle is passed through the fabric sections just outside of the edges of the turned back portions f and f, so that these folded edges are completely encircled by the overed e stitching.

The edge turner or scroll 16, as above described, is so positioned that these folded edges will be completely turned around the stitch finger when the over-edge stitches are laid across the end of the folder and as the fabrics are fed forward underneath the presser foot these stitches will slip off from the end of thefolder on to the folded edges of the sections which are still around the stitch finger. After the stitches are set a further feed of the fabric sections carries the stitches off from the stitch finger, and withdraws the folded edges from around the stitch finger.

While I have described my edge turner as operating to turn both of the trimmed edges of the fabric sections, it Wlll be understood that one edge of two fabric sections to be joined may be trimmed, while the other edge is guided to the stitching mechanism, so that the trimmed edge will be folded about the other fabric section and only one edge folded. It will also be understood that a single fabric may be fed to stitches for forming an artificial selvage for 'the cut edge of the fabric.

It is obvious that minor changes in the details of construction may be made without departing from the spirit of the lnvention as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination of over-edge stitch forming mechanism, means for trimming the edge of the fabric in advance of the stitching mechanism, a stitch finger, and means spaced from the stitch finger for folding the trimmed edge of the fabric around the stitch finger, whereby the overi,233,c72 wet edge stitches encircling the stitch finger are caused to encircle a folded edge of the fabric.

2. The combination of over-edge stitch forming machanism, means for trimming the edge of the fabric in advance of the stitching mechanism, a stitch finger, a presser foot, said presser foot having an edge turner spaced from the stitch finger and disposed relative to the stitch finger, so as to fold the trimmed edge of the fabric around the stitch finger prior to the encircling of the same by the over-edge stitches.

3. The combination of over-edge stitch forming mechanism, means for trimming the edge of the fabric in advance of the stitching mechanism, a throat plate, a stitch finger carried thereby, a presser foot, an edge turner carried by said presser foot and projecting below the surface thereof, said edge turner being so disposed relative to the stitch finger that the cut edge of the fabric is turned around the stitch finger on the throat plate and the over-edge stitches are laid across said edge turner and fed off from the same on to the stitch finger.

4. The combination of over-edge stitch forming mechanism, means for trimming the edge of the fabric in advance of the stitching mechanism, a throat plate, a stitch finger carried thereby, a presser foot, an edge turner'carried by said presser foot and projecting below the surface thereof, said edge turner being so disposed relative to the stitch finger that thecut edge of the fabric is turned around the stitch finger on the throat plate and the over-edge stitches are laid across said edge turner and fed off from the same on to the stitch finger, and

means for supporting said edge tumor,

whereby the same may be adjusted on the presser foot in a direction at right angles to the line of feed.

5. The combination of over-edge stitch forming mechanism for joining and covering the cut edges of fabric sections, 'a throat plate having a stitch finger, a presser foot, an edge turning scroll carried by the presser foot and projecting downwardly therefrom, said edge turning scroll being. so positioned relative to the stitch finger and the overedge stitching mechanism as to turn the edges of the fabric sections underneath the body portion of said fabric sections, the over-edge stitches being laid across said edge turning scroll and fed off from the same on to the folded edges of fabric sections.

6. The combination of over-edge stitch forming mechanism for joining and covering the cut-edges of fabric sections, a throat plate having a stitch finger, a presser foot, an edge turning scroll carried by the presser foot and projecting downwardly therefrom, said edge turning scroll being so positioned relative to the stitch finger and the over-edge stitching mechanism as to turn the edges of the fabric sections underneath the body portion of said fabric sections, the over-edge stitches being laid across said edge turning scroll and fed off from the same on to the folded edges of fabric sections, said stitch finger being extended beyond the end of the edge turning scroll, whereby the over-edge stitches are set around said stitch finger and subsequently fed off from said stitch finger.

7. The combination of a presser foot having a combined edge turner and stitch finger projecting below the fabric engaging surface of the presser foot, and a throat plate having a stitch finger arranged in cooperative relation to sald edge turner, whereby the edge of the fabric is folded by said turner around the stitch finger on said throat plate. v

In testimony whereof, I affix my signature in the presence of two witnesses.

JESSE J. HEAR Witnesses:

1B. O. MERK, JOHN W. WAGNER. 

